Yes, purple heart grown indoors does well as a houseplant. You just need a bright south-facing window that gets at least 6 hours of direct sunlight each day. Without enough light, your plant loses its purple color and turns a dull green.
I learned this the hard way with my first indoor purple heart. I placed it on an east-facing windowsill that only got a few hours of morning sun. Within a month the new leaves came in pale green instead of purple. The older purple leaves stayed, but everything fresh was green. I moved the pot to my south-facing kitchen window and the color started returning within two to three weeks. If you don't have strong natural light, try an LED grow light about 10 inches above your plant. This simple fix brought back the deep purple tones on mine.
The color issue comes down to anthocyanin production. Your purple heart needs high light intensity to make the pigment that gives its leaves that rich violet hue. Outdoor plants get thousands of foot-candles of light. Your indoor spots deliver far less, even next to a window. Glass filters out some UV rays and walls block light from most angles. This light gap is the biggest challenge you'll face with indoor purple heart care.
Your best bets are sunrooms and south-facing windows. These spots deliver the most direct sun to keep your foliage vivid. A purple heart windowsill plant sitting right against the glass in a south or west spot will hold its color through spring and summer. Winter is trickier because the sun sits lower and daylight hours shrink. That's when you should run a grow light for 4 to 6 extra hours per day to fill the gap.
Light and Rotation
- Placement: Set the pot directly on the windowsill rather than a few feet back in the room, since light drops off fast with distance from glass.
- Rotation: Turn the pot a quarter turn each week so all sides of the plant get direct sun and it grows evenly instead of leaning toward the window.
- Supplemental light: Add an LED grow light if your window gets fewer than 6 hours of sun, running it on a timer to fill the gap without effort.
Watering and Humidity
- Less frequent watering: Indoor air moves less and the soil dries slower, so water every 10 to 14 days instead of the weekly schedule used outdoors.
- Drainage check: Always use a pot with holes at the bottom since soggy roots are the fastest way to kill an indoor purple heart plant.
- Humidity boost: Mist the leaves a few times per week or place the pot on a pebble tray if your home's humidity drops below 40% in winter.
Cleaning and Feeding
- Dust removal: Wipe each leaf with a damp cloth once a month so dust doesn't block light absorption and reduce the plant's ability to photosynthesize.
- Fertilizer schedule: Feed with a balanced liquid fertilizer at half strength once a month during spring and summer, then stop feeding in fall and winter.
- Pruning: Pinch back leggy stems to encourage bushier growth since indoor plants tend to stretch toward the light more than outdoor ones.
One bonus of growing purple heart indoors is that you skip most pest problems. Outdoor plants deal with aphids, slugs, and caterpillars, but your indoor plant stays much cleaner. The occasional mealybug might show up, but you can wipe it off with a cotton swab dipped in rubbing alcohol.
Give your indoor purple heart the brightest spot in your home, adjust your watering for the slower indoor drying rate, and keep the leaves clean. Follow these steps and you'll have a striking houseplant that holds its color and grows strong all year long.
Read the full article: Purple Heart Plant Care and Growing Guide
